Answer:
It's called International Sign. While the more commonly used term is International Sign, it is sometimes referred to as Gestuno, or International Sign Pidgin and International Gesture (IG)
Explanation:
Historical......................
B) usted
D) tú
A) usted
B) El
C) tu
I can't figure out the last ones.. sorry
I believe that the benefit may be that the candidate(s) would be more accurately elected because every citizen would have exercised his/her rights and selected the most worthy candidate. However, I think the risk could be great as well. For example, many legal voters are uninformed, and this could lead to uninformed voters choosing a careless candidate. This is due to the fact that he/she would be mandated to vote.